Window-blind operator



(No Model.)

A O. SHATSIOK- WINDOW BLIND OPERATOR. No. 535,176, Patented Mar. 5,1895.

$5 afy Z N V r\( V m m m 4 m A, w I M 7 w Z UNITE TTES ARTHUR O.SI-IATSICK, OF ST. LOUIS, MISSOURI.

WINDOW-BLIND OPERATOR.

SPECIFICATION forming part of Letters Patent N 0. 535,176, dated March5, 1 895.

Application filed September I 1894. Serial No. 521,898. (No model.)

To ctZZ whom it may concern:

Be it known that I, ARTHUR O. SHATSICK, a citizen of the United States,residing at the city of St. Louis, State of Missouri, have invented acertain new and useful Improvement in Window-Blind Operators, of whichthe following is a full, clear, and exact description, reference beingbad to the accompanying drawings, wherein- Figure l is a sectional viewthrough the window-casing, showing the window-blind and its operatingmechanism in end elevation. Fig. 2 is an outside view of ablindin aclosed position. Fig. 3 is a detail view of aform of torsional springand casing. Fig. 4 is a detail sectional view, through the handle orknob, which is placed upon the end of the operating chain. Fig. 5 is adetailed view of the central spindle of the knob. Fig. 6 is a detailview of a spring locking plate; and Fig. 7 is a bottom plan-view of awindow-blind, illustrating the fllexible chain-retaining foot.

This invention relates to a new and useful improvement in window blindoperators, and consists in the construction, arrangement and combinationof the several parts, all as will hereinafter be described and afterwardpointed out in the claims.

In the drawings, A indicates the windowcasing, B the window-blind, and 0its hinges, said hinges being shown as the common lock hinges.Introduced between the sections of these hinges are washers D, whichprevent the parts from becoming locked when the shutter is beingoperated.

E indicates a torsional spring which is seated in suitable caps,mounted, respectively, on the casing and shutter, said caps beingnotched around their peripheries, to permit regulation of the tension ofthe spring. In Fig. 3 I have shown an improved form of casing for thespring which consists of an inverted cup-shaped shell F, in which isarranged the spring E,the other section F being formed with a spindle f,which is seated in the top of a shell F. In this construction, shell Fis preferably arranged on the shutter, and the'section F on the casing.Notches are arranged in the section F, in which the end of the springmay be placed to regulate the tension, the shell holding the spring toits seat by bearing upon the spindle.

G indicates a chain which is attached to the inner face of the shutterand passes through a suitable opening in the sill to the interior of theroom. On the inner face of the sill and over the chain opening is achain looking plate H, which is formed with a key-hole opening it forthe passage of the chain. The chain in passing through the enlargementof this opening meets with no obstruction, but should it be pulled toone side into the narrow neck, its links will be locked against theshoulders on the plate. This chain locking plate also serves as awear-platefor the chain opening, and guides the chain in its passagethrough the sill opening. On the end of the chain, I preferably arrangea hand-grasp or handle, which consists of the central spindle I having alongitudinal groove 11 and two oppositely-projecting lugs c". The chainis laid in this groove, so that the projection i will be between thelinks thereof and the spool portion of the handle J slipped down overthe spindle, thereby locking the chain in position, the lugs orprojections t" preventing the chain from being pulled out.

Arranged on the inner lower end of the shutter, is a wear-plate K,against which the chain contacts when the shutter is in an openposition. I preferably arrange a foot 10 on the lower edge of thiswear-plate, which serves to hold the chain in position, should it byanyreason become slack, which foot, also, keeps the chain against thecorner of the shutter, in order to locate the point of pull on the blindto one side of its fulcrum, thereby preventing any disarrangement andconsequent bad working of the mechanism, which would result if the chainslipped below the edge of the blind.

I preferably arrange on the lower inner edge of the blind, inconjunction with the foot is, a flexible foot L, which projects inwardlysome distance, serving the same purpose as the foot is, but which footL, when the blind is closed, is forced beneath the blind by coming incontact with the sill. This foot L is advantageous in some instances,because in the use of the foot 70 it might be found necessary to make apocket in the sill to receive the foot it.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, is

1. In ablind operator,the combination with the blind, of lock hinges, awasher introduced between the sections of said hinges, a torsion-springfor holding the blind open, a chain, and means for locking the chain, soas to hold the blinds in any adjusted position, substantially asdescribed.

2. In alolind-operator, the combination with the blind, of a wear-plateon its lower inner edge, a foot projecting from said wearplate, a chainwhich is secured to the blind and adapted to contact with the Wear-platewhen the blind is in an open position, and a chain locking-plate, whichis formed with a keyhole opening co-operating with the links of thechain to lock the same in any adjusted position, substantially asdescribed.

3. In ablind-operator,the combination With a blind, of a chain which issecured thereto, a chain locking plate for the chain, and a yieldingfoot which is secured to the lowerinner edge of the shutter forsustaining the chain, substantially as described.

4. In a blind-operator, the combination with the blind, of a chainsecured thereto, and a handle for the chain consisting of a centralspindle grooved longitudinally and formed with opposite projections, anda spool which is slipped over said spindle to lock the chain in place,substantially as described.

5. In a blind-operator,the combination with the blind, of an invertedcup-shaped shell secured thereto, a torsion-spring which is received insaid shell, and aframe section which is formed with a spindle passingthrough the spring and seated in the upper end of the shell, said framesection being also formed with grooves around the bottom of the spindlefor receiving the lower end of the spring to regulate the tensionthereof, substantially as described.

In testimony whereof I hereunto affix my signature, in presence of twowitnesses, this 28th day of August, 1894.

ARTHUR O. SHATSICK.

Witnesses:

F. R. CORNWALL, HUGH K. WAGNER.

